When the TV that's plugged into my new HTPC is turned off, HDMI audio goes missing from the playback device list. The only remedy is to restart the computer with the TV on.
This same problem has been discussed a few times:
Lost Sound after turning of TV (HD4600 HDMI + LG TV)
Problem with HDMI audio using intel hd 4600 graphics
Intel 4400 graphics no audio when resume from sleep in 8.1
I'd like to know when we can expect a fix for this.